Attachable socket for fixed focus lamps



March 8, 1938.. c. w. 'ANKLAM ATTACHABLE SOCKET FOR FIXED FOCUS LAMPS Filed Oct. 16, 1933 INVENTOR as iK/Zn Addm Mm 1AM Mia q ATTORNEYS Patented Mar. 8, 1938 Q omen STATES 2,110.1:1 v s'rrsonsam socxa'r ron rrxnn FOCUS a name Charles w. Ankiam Detroit. Mich assignor. by

assignments, to Kingston Products Corpora'tlon, a corporation of Indiana Application October 16, 1988, Serial No. 693,870 1: Claims. (01. 240-41) The invention relates to lamps, and more particularly to vehicle head lamps of the so-called flxed focus type where the lamp is non-adiustably mounted in, flxed relation to the reflector.

In order to increase theaccuracyof the fixed 4 focus head lamps it has heretofore been proposed to provide the lamp with,an annular flange arranged in very accurate relation with the'fllament or fllaments of the lamp and adapted to seat within a recess in the reflector itself.

It is the primary object of the-present invention to obtain an improved construction of socket adapted for a head lamp using the aforementioned type champ and reflector. 7

Another object of the invention is to provide a lampsocket attachable and detachable from the reflector as a unit.

A further object of the invention is to provide a lamp socket adapted to insure very'accurate regic..ation oi the lamp with respect to the re- 20 flector. g

These and other objects are attained with the construction as hereinafter more fully described.

,In the drawing:

Fig. l is an axialsection through a portion of a head lamp to which my improvement is applied;

Fig. 2 is afront elevation thereof: Fig. 3 is a perspective view of the reflector and the lamp socket detached therefrom. l I

As illustrated. A is a portion of a paraboloidal reflector and B is a lamp provided with exactly positioned locatingmeans. As speciflcally shown, B

- the locatingimeans for the lamp B comprises an annular flange C which surrounds the metallic lamp base D, and which is'provided with three embossed bearing points I! on the rear side thereof. In the manufacture of this lamp the flange C is so positioned that its periphery is exactly concentric with a longitudinal axis through the lamp having a predetermined relation to the filaments. Also, the bearing points ii are in a planeperpendicular to this axis and spaced from the filaments an exactly predetermined distance." Y

tain the exact positioningof' the lamp filaments with respect to the' reflector f have provided the latter with a central recess 1" formed integral therewith. The peripheral wall Ci of this recess no is concentric with an axis passing through the point an exact distance. Thus by merely plac x To simplify the construction, and also to ob-,

ing the lamp with the flange C engaging the recess I, it will be properly positioned in relation to the reflector. The bottom 1-! of the recess 1' is here shown as provided ,with a central aperture W largeenough to leavefree the adjacent parts of the structure of the flange C and the lamp base in general. g I For retaining the lamp in this position, and for providing electrical connections therewith. I have devised a .iamp socket whicin however, is detachable from the reflector, the construction. being as follows:

I is a cylindrical socket member within which is arranged the insulator plug J for supporting the spring contact members K of any suitable construction. The member I is provided with a radially outwardly extending flange L terminating in a longitudinally extending flange M forming the cup for receiving a coil spring 0. P is a cupped'member for engaging the opposite end n of the spring 0 and centrally apcrtured to provide clearance for the lamp base D. The members I and P are secured to each other by a plurality of headed pins Q. The heads R, at the forward ends of these pins. have a shouldered engagement with the member P. as indicated at R. and are adapted to pass through the large ends of tapering segmental slots 8 in the lamp flange C.

To mount the socket on the reflector the latter 1 is provided with apertures T through which the heads R of the pins Q may pass, and the member- P is then locked by a plurality of spring clips U having hooked ends U passing through slots U .-in the reflector. when thus attached. the lamp may be readily secured in position by engaging thelarge ends of the slots 5 withthe heads R and then turning the flange C to engage the heads with the tapering portion of said slot. This action will cam outward the heads It. so as to separate the shoulder R from' its bearing on the mem- 40 her P and place the tension of the spring 0 on' the pins Q. 'lhis will hold the bearing points it on the flange C. in flrm contact with the bottom He! the recess. To hold the socket from any rotative displacement with respect to the re- 40 flector. the rear face of the recessed portion of the latter is provided with struck out prongs V which engage registering recesses v' in the member P. Thus when the flange C is turned to bring the heads R to the limit of the tapering slots 8, 5 the fllament or fllaments will be accurately posi- The ccnstruction above described has the advantage that 'the lamp socket is a separate unit I a central'recess, and a lamp-having a positioning ,flange seated in said recess and provided with a pluralityof segmental slots. of a lamp socket from the reflector and may be readily attached or detached. Also the single spring 0 arranged between the elements L, and P serves to place tension upon all of the pins Q. Thus the construction is simple, can be manufactured at low cost, and may be quickly engaged with any re-' flector without regard to its specific design.

While I have shown and described one form which my invention may assume, it will be understood that this disclosure is illustrative only, and that my invention is not limited thereto.

What I claim as my invention is:

1. In,a flxedv focus lamp assembly, the combination with a concave reflector provided with a central recess,.and a lamp having a positioning flange engaging said recess and provided with a plurality of segmental slots, of a contact carrier detachably engaging the rear of said reflector, said carrier comprising two relatively movable members, a spring between said members,'and

pins, having heads, connecting said members and limiting the relative movement thereof under the tension of said spring, said reflector being, provided with registering apertures constructed and arranged-for the passage of said heads therethrough, and said heads being adapted to pass through said registering apertures in said reflece tor into operative engagement with the slots in said, flange.

2. In a flxed focus lamp assembly, the combination with a concave reflector provided with a central recess, and a lamp having a positioning flange seated in said recess and provided with a plurality of segmental slots, of a lamp'socket for detachably engaging the rear \of said reflector, said socket comprising amember for carrying the electrical contacts, a plurality of headed pins extending forward from said member, a member slidably engaging said pins adjacent the forward heads thereof, a spring surrounding said pins and engaging said members, said reflector being provided with i'egistering apertures constructed and arranged for the passage of said heads therethrough, and said heads of said pins. being insertable through said registering apertures in fordetachably engaging the rear of said reflector, said socket comprising a member for carrying the electrical contacts, a plurality oirheaded pins extending forward from saidmember, a member slidably engaging said pins adjacent the forward a heads thereof,- a spring surrounding said pins and relative rotational movement of said socket and said reflector, and clips for securing said socket to said reflector.

4; In a flxed focus vehicle lamp, the combination with aconcave reflector provided with a -central recess, and-a lamp having'a positioning flange seated in said recess and provided with erative engagement of a lamp socket comprising a pair of reversely turned cup shaped members, the rear member thereof having mounted thereolithe electrical contacts, arspring having itsopposite ends seated in said cup shaped members, a plurality of pins secured to the rear cup shaped member and provided with shoulderedheads engaging the forward face of the forward cup shaped member,

said shouldered heads being adapted to pass to the filament or fllaments of the lamp, said flange being provided with a plurality of segmental slots, of a paraboloidal reflector centrally depressed to form.- a recess for receiving and cooperating with said flange, centraily apertured for the passage of the lamp base therethrough, and having slots for registering with the segmental apertures of said flange, asocket in rear of said reflector for engaging said lamp base and provided with a plualityof pins passing through said apertures in the recess of said reflector and positioned for engagement with the segmental slots of said flange, and a single spring for placing a resilient tension on said pins to retain said flan'ge in engagement with said recess.

6. In a lamp assembly, the combination with a lamp having a positioning flange surrounding the base thereof, and in exactly predetermined. relation to the fllament or filaments of the lamp, said flange having slots therein, of a paraboloidal reflector centrally rearwardly embossed to form a recess for receiving and cooperating with said flange, centrally recessed for the passage of the lamp base therethrough, and having apertures for registering with the se ental slots of said flange, a lamp socket comprising a pair of cupped members and a spring therebetween and a plu- I rality of headed pins for securing said members to each other, saidpins being positioned to register with the apertures in said reflector and with the slots in said flange, the rear member of d socket having mounted thereon the insula electrical contacts for the lamp" and the forward member being apertured for receiving the base of the bulb, -and clips for-securing the forward member of said socket to said reflector whereby said pins may be engaged by the-segmental slots of said flange and whereby said spring will place a resilient tension on said pins to retain said flange in engagement with said recess.

7. In a lampassembly, the combination of a concave reflector, alarnp having a securing, flange engageable with said reflectgr, a contact carrier engaging the rear of said reflector, said carrier comprising two relatively movable members, a spring between said members, and pins, having heads, connecting said members and limiting the relative movement. thereof under tension of said "spring, said reflector being-provided with registering apertures constructed and arranged for the passage of said heads therethrough,,and

said headsbeing adapted to pass through-said 7 a plurality of segmental slots through said flange. gagement with said reflector.

B. in a lamp assembly, the combination or a concave reflector, a lamp "having a securing flange engageable with said reflector, a lamp socket engaging the rear 01' said reflector, said socket comprising two relatively movable members, a'spring between said members, and headed pins connecting said members and limiting the relative movement thereof under tension 01' said spring, the forward ends of said pins being adapted to pass through said reflector into operative engagement with said flange therebyholdingsaid socket and said lamp in flrm engagement with said reflector, and auxiliary means for se-. curing said socket-to said reflector when said lamp is removed.

9. In a lamp assembly, the combination oi a concave reflector, a lamp having a flange ior engaging the front side of said reflector, a socket engaging the rear "side oi said reflector, resilient engaging means on said socket engageable with saidflange 01 said lamp to hold said socket and said lamp in engagement with said reflector, said engaging means passing ireely through said reflector in a direction normal to said reflector from the position said engaging means occupies when holding said flange, thereby permitting. removal of said lamp socket from the rear when said lamp is removed from the front, and auxiliary retaining means for holding said lamp socket to said reflector when said lamp bulb is removed.

10. In combination? an electric lamp having- 1 a base; a mounting for said-lamp; means 101' connecting said lamp to said mounting, includins. a lateral extension on said base, engaging 'means for engaging said lateral extension. re-L silient means acting to press said engaging means against said lateral extension, to press said lateral extension against said mounting, said engaging means and said resilient means comprismember tor holding said unit on said mounting upon removal of said lamp.

,l1."In combination: an incandescent electric lamp having abase; a mounting !or said lamp;

Patent n 2,110,1 1-

, a ionsi cERT'IFIcArEoF CORRECTION.

H. ANKLAH.

means for connectingsaidlamp to said mountlng, including, a lateral extension on said base, a projection having a transverse extension at its free end for engaging said lateral extension on said base, a carrying member having an aperture through which said projection is dis-- to press said transverse extension against said; lateral exten- ,and resilient means act sion, to-press said lateral extension against said mounting, and ,to' press said transverse extension against said carrying member when said lampisremoved.

12. A unitary device, constructed and arranged to connect an incandescent electric lamp to a Y mounting, comprising: a carrying member; at

.tensions at their free ends; a washer member on said projections between said lateral extension and said carrying member, said washer member restrain movement .otsaid projections relatively to each other both circumferentially and radially, andresillent means biasing said washer member toward said lateral extension.

ing means including a'carrier member, and including also a projection disposed through and spaced from the margin oi said aperture, said projection beingcarried by said carrier member,

structod and" arranged to cooperate with said arcuate slot, and so constructed and arranged that upon rot movement of said lamp said projection presses said;lateral extension against said mounting; and separate means for preventing relativerotational movement'oi said unitary" pressing means and said mounting. v

. CHARLES w. ANKLAM.

ai e .8} 958.

, It is hereby certiified that Em appears in the printed specification of the above ra nbered patent requiring correc-tion as follows: Page 3 first column, beginnin'g withline 1 5, strike out allto and including line l2,

second column, comprising claim 11, suitor-present claims 12 and 15=read 11 a.nd 12 respectively?" and thatthe -said- Letters Patent should be read the case in the-Patent orrieel with these corrections -therein that'the some may conform to therecord of signed sealed this 3d day 01" Hay, D. .1938.

(Seal) Henry Yan'ArsdaIe; v .iLcting Gcmissionerot Patents.

having apertures the margins of which fixedly aperture; unitary pressing means, detachably seemed as a unit to said mduntingl said press- ,and unitary with said carrier member, con- -v B. in a lamp assembly, the combination or a concave reflector, a lamp "having a securing flange engageable with said reflector, a lamp socket engaging the rear 01' said reflector, said socket comprising two relatively movable members, a'spring between said members, and headed pins connecting said members and limiting the relative movement thereof under tension 01' said spring, the forward ends of said pins being adapted to pass through said reflector into operative engagement with said flange therebyholdingsaid socket and said lamp in flrm engagement with said reflector, and auxiliary means for se-. curing said socket-to said reflector when said lamp is removed.

9. In a lamp assembly, the combination oi a concave reflector, a lamp having a flange ior engaging the front side of said reflector, a socket engaging the rear "side oi said reflector, resilient engaging means on said socket engageable with saidflange 01 said lamp to hold said socket and said lamp in engagement with said reflector, said engaging means passing ireely through said reflector in a direction normal to said reflector from the position said engaging means occupies when holding said flange, thereby permitting. removal of said lamp socket from the rear when said lamp is removed from the front, and auxiliary retaining means for holding said lamp socket to said reflector when said lamp bulb is removed.

10. In combination? an electric lamp having- 1 a base; a mounting for said-lamp; means 101' connecting said lamp to said mounting, includins. a lateral extension on said base, engaging 'means for engaging said lateral extension. re-L silient means acting to press said engaging means against said lateral extension, to press said lateral extension against said mounting, said engaging means and said resilient means comprismember tor holding said unit on said mounting upon removal of said lamp.

,l1."In combination: an incandescent electric lamp having abase; a mounting !or said lamp;

Patent n 2,110,1 1-

, a ionsi cERT'IFIcArEoF CORRECTION.

H. ANKLAH.

means for connectingsaidlamp to said mountlng, including, a lateral extension on said base, a projection having a transverse extension at its free end for engaging said lateral extension on said base, a carrying member having an aperture through which said projection is dis-- to press said transverse extension against said; lateral exten- ,and resilient means act sion, to-press said lateral extension against said mounting, and ,to' press said transverse extension against said carrying member when said lampisremoved.

12. A unitary device, constructed and arranged to connect an incandescent electric lamp to a Y mounting, comprising: a carrying member; at

.tensions at their free ends; a washer member on said projections between said lateral extension and said carrying member, said washer member restrain movement .otsaid projections relatively to each other both circumferentially and radially, andresillent means biasing said washer member toward said lateral extension.

ing means including a'carrier member, and including also a projection disposed through and spaced from the margin oi said aperture, said projection beingcarried by said carrier member,

structod and" arranged to cooperate with said arcuate slot, and so constructed and arranged that upon rot movement of said lamp said projection presses said;lateral extension against said mounting; and separate means for preventing relativerotational movement'oi said unitary" pressing means and said mounting. v

. CHARLES w. ANKLAM.

ai e .8} 958.

, It is hereby certiified that Em appears in the printed specification of the above ra nbered patent requiring correc-tion as follows: Page 3 first column, beginnin'g withline 1 5, strike out allto and including line l2,

second column, comprising claim 11, suitor-present claims 12 and 15=read 11 a.nd 12 respectively?" and thatthe -said- Letters Patent should be read the case in the-Patent orrieel with these corrections -therein that'the some may conform to therecord of signed sealed this 3d day 01" Hay, D. .1938.

(Seal) Henry Yan'ArsdaIe; v .iLcting Gcmissionerot Patents.

having apertures the margins of which fixedly aperture; unitary pressing means, detachably seemed as a unit to said mduntingl said press- ,and unitary with said carrier member, con- -v 

